A method for producing industrial pallets from used clothes

Abstract

The application discloses a method for preparing industrial pallets from waste clothes, which comprises the following steps: obtaining waste clothes, chopped reinforcing fibers and thermoplastic resin, crushing the waste clothes into cloth strips; spraying a modifier on the cloth strips and the chopped reinforcing fibers; adding a plasticizer and nanoparticles into the cloth strips, the chopped reinforcing fibers and the thermoplastic resin, and continuously mixing in a mixer for a preset time to obtain a mixed material in a molten state; placing the material in a kneader, extruding the material into a preset mold of a molding machine, increasing the temperature to a preset temperature for low-pressure pre-pressing, rapidly cooling to a crystallization temperature for high-pressure molding, and obtaining the industrial pallets. The method can realize recycling of the waste clothes, change the waste clothes into the industrial pallets with excellent performance, save the raw material cost for manufacturing the industrial pallets, and reduce the environmental bearing pressure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of waste recycling, and particularly relates to a method for preparing industrial pallets from waste clothes. BACKGROUND

[0002] With the improvement of people's living standards, many people will throw away clothes that are not worn or only worn a few times every season, ignoring the recycling value of old clothes. If the old clothes are not properly disposed of and thrown around, it may cause serious environmental problems. There is no effective way to recycle old clothes in the prior art, and old clothes cannot be converted into other usable products. Many old clothes cannot be degraded and can only be piled up as garbage. The pressure on the environment caused by these old clothes is getting bigger and bigger. SUMMARY

[0003] To solve the above problems, the present application provides a method for preparing industrial pallets from waste clothes, which can realize the recycling of waste clothes and convert them into excellent performance industrial pallets, turning waste into treasure, also saving the raw material cost of making industrial pallets, reducing the environmental carrying pressure.

[0004] The method for preparing industrial pallets from waste clothes provided by the present application comprises:

[0005] Obtaining waste clothes, chopped reinforcing fibers and thermoplastic resins, and crushing the waste clothes into cloth strips;

[0006] Spraying a modifier on the cloth strips and chopped reinforcing fibers;

[0007] Adding a plasticizer and nanoparticles to the cloth strips, the chopped reinforcing fibers and the thermoplastic resins, and continuously mixing for a preset time to obtain a mixed and uniform molten material;

[0008] Placing the molten material into a kneader and extruding it into a preset mold of a mold pressing machine, increasing the temperature to a preset temperature for low-pressure pre-pressing;

[0009] Quickly cooling to the crystallization temperature for high-pressure molding to obtain an industrial pallet.

[0010] Preferably, in the method for preparing industrial pallets from waste clothes, the waste clothes are crushed into cloth strips with a length range of 5cm to 10cm.

[0011] Preferably, in the method for preparing industrial pallets from waste clothes, the modifier is at least one of dilute phosphoric acid solution, silane coupling agent and sulfuric acid solution.

[0012] Preferably, in the method of manufacturing industrial pallets using waste clothes, the length of the chopped reinforcing fiber ranges from 5mm to 30mm.

[0013] Preferably, in the method of manufacturing industrial pallets using waste clothes, the temperature of the internal mixer ranges from 160℃ to 285℃, and the preset time ranges from 5 minutes to 20 minutes.

[0014] Preferably, in the method of manufacturing industrial pallets using waste clothes, the temperature of the internal mixer ranges from 160℃ to 285℃, and the preset time ranges from 5 minutes to 20 minutes.

[0015] Preferably, in the method of manufacturing industrial pallets using waste clothes, the temperature of the internal mixer ranges from 160℃ to 285℃, and the preset time ranges from 5 minutes to 20 minutes.

[0016] Preferably, in the method of manufacturing industrial pallets using waste clothes, the temperature of the internal mixer ranges from 160℃ to 285℃, and the preset time ranges from 5 minutes to 20 minutes.

[0017] Preferably, in the method of manufacturing industrial pallets using waste clothes, the temperature of the internal mixer ranges from 160℃ to 285℃, and the preset time ranges from 5 minutes to 20 minutes.

[0018] Preferably, in the method of manufacturing industrial pallets using waste clothes, the temperature of the internal mixer ranges from 160℃ to 285℃, and the preset time ranges from 5 minutes to 20 minutes.

[0019] It can be known from the above description that, in the method for preparing the industrial tray from the waste clothes provided by the application, the waste clothes are crushed into cloth strips, a modifier is sprayed on the cloth strips and the chopped reinforcing fibers, a plasticizer and nanoparticles are added to the cloth strips, the chopped reinforcing fibers and the thermoplastic resin, and the mixture is continuously mixed for a preset time to obtain a mixed material in a molten state; the material in the molten state is put into a kneader and extruded into a preset mold of a molding machine, the temperature is increased to a preset temperature for low-pressure pre-pressing, and then the temperature is rapidly cooled to a crystallization temperature for high-pressure molding to obtain the industrial tray, so that the waste clothes can be recycled and changed into the industrial tray with excellent performance, waste is turned into treasure, the raw material cost for manufacturing the industrial tray is saved, and the environmental bearing pressure is reduced. The recycled waste clothes are modified and plasticized by the above method, combined with the molding process of low-pressure pre-pressing at high temperature and high-pressure molding at the crystallization temperature, so that the composite material industrial tray with excellent performance can be prepared, the method is suitable for large-scale production, the production process is easy to operate, the process is simple, the equipment investment is small, the production efficiency is improved, and flexible production is realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the provided drawings.

[0021] Figure 1 The method for preparing the industrial tray from the waste clothes provided by the present application is a schematic diagram of an embodiment. DETAILED DESCRIPTION

[0022] The core of the present application is to provide a method for preparing an industrial tray from waste clothes, which can realize the recycling of waste clothes and change them into industrial trays with excellent performance, turn waste into treasure, save the raw material cost for manufacturing the industrial tray, and reduce the environmental bearing pressure.

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0024] The method for preparing the industrial tray from the waste clothes provided by the present application is a schematic diagram of an embodiment Figure 1 as shown,Figure 1 A method for preparing an industrial tray from waste clothes provided by the present application is a schematic diagram of an embodiment, which can include the following steps:

[0025] S1: obtaining waste clothes, chopped reinforcing fibers and thermoplastic resin, and crushing the waste clothes into cloth strips;

[0026] It should be noted that the material of the above-mentioned waste clothes can include cotton, hemp, polyester, polypropylene, vinylon, dacron, etc. If there are metal buckles on the waste clothes, the metal buckles need to be removed first, and then crushed into cloth strips. The size of the cloth strip is not limited, as long as the clothes are broken down into smaller sizes. In an preferred embodiment, the waste clothes can be crushed into cloth strips with a length range of 5 cm to 10 cm. The length range of the above-mentioned chopped reinforcing fibers can be preferably 5 mm to 30 mm. Such size is more convenient for subsequent melting operation. In addition, the chopped reinforcing fibers can be, but are not limited to, at least one of basalt fiber, carbon fiber and aramid fiber. The above-mentioned thermoplastic resin can be, but is not limited to, at least one of nylon, polypropylene, polylactic acid and waste plastic cloth.

[0027] S2: spraying a modifier on the cloth strips and chopped reinforcing fibers;

[0028] It should be noted that the modifier can be preferably at least one of dilute phosphoric acid solution, silane coupling agent and sulfuric acid solution. The spraying speed of the modifier can be preferably 0.08 L / min to 1 L / min, the spraying radius can be 0.3 meters to 1.0 meters, and the concentration range of the modifier can be preferably 40% to 80%. Such modifier can promote the bonding strength and flowability between the fibers and the resin.

[0029] S3: adding a plasticizer and nanoparticles to the cloth strips, chopped reinforcing fibers and thermoplastic resin, and mixing for a preset time to obtain a mixed and uniformly melted material;

[0030] It should be noted that the temperature range of the mixing can be preferably 160°C to 285°C, and the preset time can be preferably 5 minutes to 20 minutes. The plasticizer and nanoparticles can be added after mixing for a certain time, which can ensure more uniform mixing. The above-mentioned plasticizer can be, but is not limited to, at least one of tricresyl phosphate (TCP), trioctyl phosphate (TOP), diisodecyl phthalate, dioctyl adipate, dioctyl sebacate. The mass fraction range of the plasticizer can be preferably 0.1% to 10%. The above-mentioned nanoparticles can be, but are not limited to, at least one of nano-titanium dioxide particles, carbon nanotube particles, nano-silicon dioxide particles and graphene oxide particles. These kinds of nanoparticles can also promote the bonding strength and flowability between the fibers and the resin.

[0031] S4: Put the molten material into the kneader, and extrude into the preset mold of the molding machine, and increase the temperature to the preset temperature for low-pressure pre-pressing;

[0032] It should be noted that the control temperature range of the kneader can be preferably 160 DEG C to 285 DEG C, and the mixing time of the molten material in the kneader can be preferably 5 minutes to 10 minutes, and the preset temperature can be the melting temperature of the waste clothes, so that the mixture can be melted into a liquid, which is convenient for subsequent shaping, and the preset temperature can be preferably 200 DEG C to 250 DEG C, and the pressure of the low-pressure pre-pressing can be preferably 1 MPa to 2.5 MPa, so that the kneading degree of each part is more uniform, and the quality of subsequent molding can be better guaranteed.

[0033] S5: Rapid cooling to the crystallization temperature for high-pressure molding to obtain the industrial tray.

[0034] It should be noted that the crystallization temperature is the temperature at which the mixture changes from liquid to solid, that is, the mixture is solidified into the same shape as the preset mold to obtain the corresponding type of industrial tray. During the cooling and crystallization process, high pressure is applied to refine the crystallization and improve the density of the composite material, resulting in an industrial tray with superior performance. It can be seen that this method realizes the effect of turning waste into treasure. This method is suitable for large-scale production, and the production process is easy to operate, the process is simple, the equipment investment is small, and the production efficiency can be improved. Flexible production.

[0035] From the above description, it can be seen that the method for preparing an industrial tray from waste clothes provided by the application includes obtaining waste clothes, chopped reinforcing fibers and thermoplastic resin, crushing the waste clothes into cloth strips; spraying a modifier on the cloth strips and chopped reinforcing fibers; adding a plasticizer and nanoparticles to the cloth strips, chopped reinforcing fibers and thermoplastic resin, and continuously mixing for a preset time to obtain a molten material with uniform mixing; putting the molten material into the kneader, and extruding into the preset mold of the molding machine, and increasing the temperature to the preset temperature for low-pressure pre-pressing; rapidly cooling to the crystallization temperature for high-pressure molding to obtain the industrial tray. Therefore, the waste clothes can be recycled and turned into an industrial tray with excellent performance, turning waste into treasure, and saving the raw material cost of making the industrial tray, reducing the environmental carrying pressure.

[0036] In one embodiment of the above method for preparing an industrial tray from waste clothes, the crystallization temperature can be preferably 10 to 50°C, the pressure of the high-pressure molding of the molding machine can be preferably 16 to 32 MPa, and the duration can be preferably 5 to 20 minutes. Furthermore, the temperature drop rate of the rapid cooling process can be preferably 1 to 20°C / min. It should be noted that in this scheme of high-temperature low-pressure pre-pressing and then high-pressure at the crystallization temperature, the high-pressure fine crystallization can enhance the density of the material, and after cooling, an industrial tray with more excellent performance can be obtained.

[0037] The above method is described below in three examples:

[0038] Example 1:

[0039] (1) The recycled waste clothes are crushed by a crusher and the metal buckles are removed, and the clothes are crushed into strips with a length of 8 cm;

[0040] (2) The waste clothes crushed into strips are moved upward on a conveyor belt, and a spray head is provided above to spray a phosphoric acid solution modifier at a speed of 0.5 L per minute, with a radius of 0.5 m;

[0041] (3) The waste clothes strips, chopped basalt fibers, and nylon 6 resin are placed in an internal mixer, with a mass ratio of 5:1:4, and the internal mixing temperature is 250°C, and the internal mixing time is 5 min;

[0042] (4) After 5 min of internal mixing, the modifier tricresyl phosphate (TCP) is added with a mass fraction of 1%, and nano-titanium dioxide particles are added with a mass fraction of 0.02%, and the internal mixing time is 5 min;

[0043] (5) The uniformly mixed material is placed in a kneader, and the kneader temperature is 250°C, and the mixing time is 5 min;

[0044] (6) The extruded material in a molten state is placed in a flat mold frame, the molding pressure is 1 MPa, the molding time is 3 min, the temperature is lowered to 192°C at a rate of 10°C / min, the molding pressure is 10 MPa, and the 5 min sample thickness is 10 mm;

[0045] (7) After cooling, an industrial tray with excellent performance is obtained.

[0046] Example 2:

[0047] (1) The recycled waste clothes are crushed by a crusher and the metal buckles are removed, and the clothes are crushed into strips with a length of 10 cm;

[0048] (2) The broken waste clothes pieces are moved upwards on a conveyor belt, and a spray head is provided above to spray a phosphoric acid solution modifier at a speed of 0.5 L per minute, with a phosphoric acid concentration of 50% and a radius of 0.5 m;

[0049] (3) The waste clothes strips, chopped basalt fibers, and nylon 6 resin are put into a Banbury mixer at a mass ratio of 5:1:4, with a mixing temperature of 250°C and a mixing time of 5 min;

[0050] (4) After mixing for 5 min, the modifier tricresyl phosphate (TCP) is added at a mass fraction of 1%, and nano-titanium dioxide particles are added at a mass fraction of 0.02%, with a mixing time of 5 min;

[0051] (5) The uniformly mixed material is put into a kneader, with a kneader temperature of 250°C and a mixing time of 5 min;

[0052] (6) The extruded molten material is placed in a flat mold frame, with a molding pressure of 1 MPa and a molding time of 3 min, and then cooled to 199°C at a rate of 5°C / min, with a molding pressure of 10 MPa and a molding time of 5 min, resulting in a sample thickness of 10 mm;

[0053] (7) After cooling, a high-performance nine-square industrial tray is obtained.

[0054] Example Three:

[0055] (1) The recycled waste clothes are crushed by a crusher and the metal buckles are removed, and the crushed cloth strips are 5 cm long;

[0056] (2) The broken waste clothes pieces are moved upwards on a conveyor belt, and a spray head is provided above to spray a phosphoric acid solution modifier at a speed of 0.5 L per minute, with a phosphoric acid concentration of 50% and a radius of 0.5 m;

[0057] (3) The waste clothes strips, chopped basalt fibers, and nylon 6 resin are put into a Banbury mixer at a mass ratio of 5:1:4, with a mixing temperature of 250°C and a mixing time of 5 min;

[0058] (4) After mixing for 5 min, the modifier tricresyl phosphate (TCP) is added at a mass fraction of 1%, and nano-titanium dioxide particles are added at a mass fraction of 0.02%, with a mixing time of 5 min;

[0059] (5) The uniformly mixed material is put into a kneader, with a kneader temperature of 250°C and a mixing time of 5 min;

[0060] (6) The extruded molten material is put into a flat mold frame, the molding pressure is 1 MPa, the molding time is 3 min, the temperature is decreased to 206°C at a rate of 1°C / min, the molding pressure is 20 MPa, and the molding time is 5 min, and the thickness of the sample is 10 mm;

[0061] (7) After cooling, the industrial pallets prepared in Examples 1 to 3 have excellent performance.

[0062] The performance test data of the industrial pallets prepared in Examples 1 to 3 are shown in Table 1.

[0063] Table 1 Performance test data of the industrial pallets prepared in Examples 1 to 3

[0064] Example Bending strength (MPa) Impact strength (J / m) Load capacity (t) Heat distortion temperature (°C) 1 17.5 76 10.5 89 2 16.8 73.1 10.9 87 3 18.1 81.6 11.3 96

[0065] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing industrial pallets using waste clothing, characterized in that, include: Obtain waste clothing, chopped reinforcing fibers, and thermoplastic resin, and shred the waste clothing into strips; A modifier is sprayed onto the fabric strips and chopped reinforcing fibers; Plasticizer and nanoparticles are added to the fabric strip, the chopped reinforcing fiber and the thermoplastic resin, and the mixture is kneaded for a preset time. The temperature range of the kneading is 160°C to 285°C and the preset time is 5 minutes to 20 minutes to obtain a uniformly mixed molten material. The molten material is placed in a kneader, the temperature of which is controlled within the range of 160°C to 285°C, and the molten material is mixed in the kneader for 5 to 10 minutes. The mixture is then extruded into a preset mold of a molding press, and the temperature is raised to a preset temperature for low-pressure pre-compression, the preset temperature being 200°C to 250°C, and the pressure of the low-pressure pre-compression being 1 MPa to 2.5 MPa. The material is rapidly cooled to the crystallization temperature and then subjected to high-pressure molding. The rapid cooling process has a temperature drop rate of 1°C / min to 20°C / min, the crystallization temperature is 10°C to 50°C, the high-pressure molding pressure of the molding machine is 16MPa to 32MPa, and the duration is 5 minutes to 20 minutes, resulting in an industrial tray.

2. The method for preparing industrial pallets using waste clothing according to claim 1, characterized in that, The process of breaking the waste clothing into strips involves breaking the waste clothing into strips with a length ranging from 5cm to 10cm.

3. The method for preparing industrial pallets using waste clothing according to claim 1, characterized in that, The modifier is at least one of dilute phosphoric acid solution, silane coupling agent and sulfuric acid solution.

4. The method for preparing industrial pallets using waste clothing according to claim 1, characterized in that, The length of the chopped reinforcing fibers ranges from 5 mm to 30 mm.

5. The method for preparing industrial pallets from waste clothing according to claim 1, characterized in that, The modifier is sprayed at a rate of 0.08 L / min to 1 L / min, and the spray radius is 0.3 m to 1.0 m.

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